Provisional — subject to revision
Central Harlem, New York
Legionnaires’ disease outbreak · Jul-Aug 2025 · New York
- 114
- Cases
- 7
- Deaths
- Closed
- Status
Suspected source
Cooling towers at Harlem Hospital and nearby construction site (Cooling tower)
What happened
NYC's largest 2025 outbreak. Cooling towers at NYC Health + Hospitals/Harlem and a construction site at 40 West 137th Street were identified as sources.
Affected ZIP codes
10027, 10030, 10035, 10037, 10039
Sources & coverage
- New York City Has Tough Cooling-Tower Rules. So Why Did So Many Test Positive for Legionella?(Pritzker Hageman)
- New Legionnaires’ Disease Outbreak Hits Central Harlem [Updated September 1, 2025](Pritzker Hageman)
- HC Info: Recent outbreaks(HC Info)
- CNN: What to know about Legionnaires
- NYC Health Dept Closes Investigation
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Primary source: Cooling towers at Harlem Hospital and nearby construction site. Figures are provisional and may be revised or withdrawn by the reporting authority. This page is for information only and is not medical or legal advice.
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